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Finding the Fourth Proportional to 143,943.98, 198,648.70 and 79,412.90

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Solution

The fourth proportional to 143,943.98, 198,648.70 and 79,412.90 is: 109,593.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,943.98 : 198,648.70 = 79,412.90 : x
  2. Step 2: Convert to fraction form
    143,943.98/198,648.70 = 79,412.90/x
  3. Step 3: Cross multiply
    143,943.98x = 198,648.70 × 79,412.90
  4. Step 4: Simplify right side
    143,943.98x = 15,775,268,156.45
  5. Step 5: Solve for x
    x = 15,775,268,156.45/143,943.98
  6. Step 6: Final answer
    x = 109,593.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.